Example of Multilingual in Xamarin.Forms applications - http://julianocustodio.com/multilingue

MainPageMultilingual.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:Multilingual"
             x:Class="Multilingual.MainPage"
             xmlns:translator="clr-namespace:Multilingual.Helpers">
    <ContentPage.Content>
        <StackLayout>
            <Label Text="{translator:Translate WelcomeMessage}"
                VerticalOptions="CenterAndExpand" 
                HorizontalOptions="CenterAndExpand" />
        </StackLayout>
    </ContentPage.Content>
</ContentPage>